In the last couple of months I've come across a couple of different project management tools. Only two remain that I can recommend from the vast array out there.

There is DotProject, an open-source PM tool that has everything you need and more. All the standard features to schedule your tasks and assign them to team-members, Gantt chart, Ticket system, a file-uploading capability and discussion boards make this one a all-arounder. We use it ourselves under www.theandb.biz.

The other one that looks like a winner even though I didn't use it extensively myself is Basecamp, designed by 37signals who are experts in UI design. If you only have one project to manage it's free. This one stands out amongst competitors for its ease of use and a strong focus on the most important features a PM needs.